American pikas all belong to the subgenus Pika, which occurs also in Eurasia.
It is of the smooth, glossy type belonging to the subgenus Lvicardium.
In Eutamias townsendii, however, the infraorbital foramen is rounded as much as in the subgenus Eutamias and in the genus Tamias.
The bullae are less inflated even than in the mink, subgenus Lutreola.
The ferrets commonly are treated as a subgenus, Putorius, along with the Old World polecat.
Cooke says of this subgenus that no British species are known.
The species of this subgenus were formerly included in Amanita.
Miller (1896:66) placed all of them in the subgenus Arvicola.
The status of Pitymys, as a genus or as a subgenus, is uncertain.
The crest is least developed in the subgenus Neotamias and most developed in the genus Tamias.
subgenus sub·ge·nus (sŭb'jē'nəs)
n. pl. sub·gen·e·ra (-jěn'ər-ə)
A taxonomic category ranking between a genus and a species.